function xmlwriter_start_element_ns(xmlwriter, prefix, name, uri) {
  // http://kevin.vanzonneveld.net
  // +   original by: Brett Zamir (http://brett-zamir.me)
  // *     example 1: var xmlwriter = xmlwriter_open_memory();
  // *     example 1: xmlwriter_start_element_ns(xmlwriter, 'xsl', 'stylesheet', 'http://www.w3.org/1999/XSL/Transform');
  // *     returns 1: true

  return xmlwriter.startElementNS(prefix, name, uri);
}
